package com.ajz.config.jwt;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
/**
 * 
 * <p> 获取java bean 用于解决filter无法注入问题 </p>
 *
 * @author xyj
 * @date 2018年11月12日
 */
@Component
public class SpringUtil implements ApplicationContextAware{

    private static ApplicationContext applicationContext;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException {
        if(SpringUtil.applicationContext == null){
            SpringUtil.applicationContext = applicationContext;
        }
    }

    public static ApplicationContext getApplicationContext(){
        return applicationContext;
    }

    //根据name
    public static Object getBean(String name){
        return getApplicationContext().getBean(name);
    }

    //根据类型
    public static <T> T getBean(Class<T> clazz){
        return getApplicationContext().getBean(clazz);
    }

    public static <T> T getBean(String name,Class<T> clazz){
        return getApplicationContext().getBean(name,clazz);
    }
}
